1 /*- 2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * i.MX6 Synchronous Serial Interface (SSI) 29 * 30 * Chapter 61, i.MX 6Dual/6Quad Applications Processor Reference Manual, 31 * Rev. 1, 04/2013 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/malloc.h> 43 #include <sys/rman.h> 44 #include <sys/timeet.h> 45 #include <sys/timetc.h> 46 47 #include <dev/sound/pcm/sound.h> 48 #include <dev/sound/chip.h> 49 #include <mixer_if.h> 50 51 #include <dev/fdt/fdt_common.h> 52 #include <dev/ofw/openfirm.h> 53 #include <dev/ofw/ofw_bus.h> 54 #include <dev/ofw/ofw_bus_subr.h> 55 56 #include <machine/bus.h> 57 #include <machine/cpu.h> 58 #include <machine/intr.h> 59 60 #include <arm/freescale/imx/imx6_sdma.h> 61 #include <arm/freescale/imx/imx6_anatopvar.h> 62 #include <arm/freescale/imx/imx_ccmvar.h> 63 64 #define READ4(_sc, _reg) \ 65 bus_space_read_4(_sc->bst, _sc->bsh, _reg) 66 #define WRITE4(_sc, _reg, _val) \ 67 bus_space_write_4(_sc->bst, _sc->bsh, _reg, _val) 68 69 #define SSI_NCHANNELS 1 70 71 /* i.MX6 SSI registers */ 72 73 #define SSI_STX0 0x00 /* Transmit Data Register n */ 74 #define SSI_STX1 0x04 /* Transmit Data Register n */ 75 #define SSI_SRX0 0x08 /* Receive Data Register n */ 76 #define SSI_SRX1 0x0C /* Receive Data Register n */ 77 #define SSI_SCR 0x10 /* Control Register */ 78 #define SCR_I2S_MODE_S 5 /* I2S Mode Select. */ 79 #define SCR_I2S_MODE_M 0x3 80 #define SCR_SYN (1 << 4) 81 #define SCR_NET (1 << 3) /* Network mode */ 82 #define SCR_RE (1 << 2) /* Receive Enable. */ 83 #define SCR_TE (1 << 1) /* Transmit Enable. */ 84 #define SCR_SSIEN (1 << 0) /* SSI Enable */ 85 #define SSI_SISR 0x14 /* Interrupt Status Register */ 86 #define SSI_SIER 0x18 /* Interrupt Enable Register */ 87 #define SIER_RDMAE (1 << 22) /* Receive DMA Enable. */ 88 #define SIER_RIE (1 << 21) /* Receive Interrupt Enable. */ 89 #define SIER_TDMAE (1 << 20) /* Transmit DMA Enable. */ 90 #define SIER_TIE (1 << 19) /* Transmit Interrupt Enable. */ 91 #define SIER_TDE0IE (1 << 12) /* Transmit Data Register Empty 0. */ 92 #define SIER_TUE0IE (1 << 8) /* Transmitter Underrun Error 0. */ 93 #define SIER_TFE0IE (1 << 0) /* Transmit FIFO Empty 0 IE. */ 94 #define SSI_STCR 0x1C /* Transmit Configuration Register */ 95 #define STCR_TXBIT0 (1 << 9) /* Transmit Bit 0 shift MSB/LSB */ 96 #define STCR_TFEN1 (1 << 8) /* Transmit FIFO Enable 1. */ 97 #define STCR_TFEN0 (1 << 7) /* Transmit FIFO Enable 0. */ 98 #define STCR_TFDIR (1 << 6) /* Transmit Frame Direction. */ 99 #define STCR_TXDIR (1 << 5) /* Transmit Clock Direction. */ 100 #define STCR_TSHFD (1 << 4) /* Transmit Shift Direction. */ 101 #define STCR_TSCKP (1 << 3) /* Transmit Clock Polarity. */ 102 #define STCR_TFSI (1 << 2) /* Transmit Frame Sync Invert. */ 103 #define STCR_TFSL (1 << 1) /* Transmit Frame Sync Length. */ 104 #define STCR_TEFS (1 << 0) /* Transmit Early Frame Sync. */ 105 #define SSI_SRCR 0x20 /* Receive Configuration Register */ 106 #define SSI_STCCR 0x24 /* Transmit Clock Control Register */ 107 #define STCCR_DIV2 (1 << 18) /* Divide By 2. */ 108 #define STCCR_PSR (1 << 17) /* Divide clock by 8. */ 109 #define WL3_WL0_S 13 110 #define WL3_WL0_M 0xf 111 #define DC4_DC0_S 8 112 #define DC4_DC0_M 0x1f 113 #define PM7_PM0_S 0 114 #define PM7_PM0_M 0xff 115 #define SSI_SRCCR 0x28 /* Receive Clock Control Register */ 116 #define SSI_SFCSR 0x2C /* FIFO Control/Status Register */ 117 #define SFCSR_RFWM1_S 20 /* Receive FIFO Empty WaterMark 1 */ 118 #define SFCSR_RFWM1_M 0xf 119 #define SFCSR_TFWM1_S 16 /* Transmit FIFO Empty WaterMark 1 */ 120 #define SFCSR_TFWM1_M 0xf 121 #define SFCSR_RFWM0_S 4 /* Receive FIFO Empty WaterMark 0 */ 122 #define SFCSR_RFWM0_M 0xf 123 #define SFCSR_TFWM0_S 0 /* Transmit FIFO Empty WaterMark 0 */ 124 #define SFCSR_TFWM0_M 0xf 125 #define SSI_SACNT 0x38 /* AC97 Control Register */ 126 #define SSI_SACADD 0x3C /* AC97 Command Address Register */ 127 #define SSI_SACDAT 0x40 /* AC97 Command Data Register */ 128 #define SSI_SATAG 0x44 /* AC97 Tag Register */ 129 #define SSI_STMSK 0x48 /* Transmit Time Slot Mask Register */ 130 #define SSI_SRMSK 0x4C /* Receive Time Slot Mask Register */ 131 #define SSI_SACCST 0x50 /* AC97 Channel Status Register */ 132 #define SSI_SACCEN 0x54 /* AC97 Channel Enable Register */ 133 #define SSI_SACCDIS 0x58 /* AC97 Channel Disable Register */ 134 135 static MALLOC_DEFINE(M_SSI, "ssi", "ssi audio"); 136 137 uint32_t ssi_dma_intr(void *arg, int chn); 138 139 struct ssi_rate { 140 uint32_t speed; 141 uint32_t mfi; /* PLL4 Multiplication Factor Integer */ 142 uint32_t mfn; /* PLL4 Multiplication Factor Numerator */ 143 uint32_t mfd; /* PLL4 Multiplication Factor Denominator */ 144 /* More dividers to configure can be added here */ 145 }; 146 147 static struct ssi_rate rate_map[] = { 148 { 192000, 49, 152, 1000 }, /* PLL4 49.152 Mhz */ 149 /* TODO: add more frequences */ 150 { 0, 0 }, 151 }; 152 153 /* 154 * i.MX6 example bit clock formula 155 * 156 * BCLK = 2 channels * 192000 hz * 24 bit = 9216000 hz = 157 * (24000000 * (49 + 152/1000.0) / 4 / 4 / 2 / 2 / 2 / 1 / 1) 158 * ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 159 * | | | | | | | | | | | 160 * Fref ------/ | | | | | | | | | | 161 * PLL4 div select -/ | | | | | | | | | 162 * PLL4 num --------------/ | | | | | | | | 163 * PLL4 denom -------------------/ | | | | | | | 164 * PLL4 post div ---------------------/ | | | | | | 165 * CCM ssi pre div (CCM_CS1CDR) ----------/ | | | | | 166 * CCM ssi post div (CCM_CS1CDR) -------------/ | | | | 167 * SSI PM7_PM0_S ---------------------------------/ | | | 168 * SSI Fixed divider ---------------------------------/ | | 169 * SSI DIV2 ----------------------------------------------/ | 170 * SSI PSR (prescaler /1 or /8) ------------------------------/ 171 * 172 * MCLK (Master clock) depends on DAC, usually BCLK * 4 173 */ 174 175 struct sc_info { 176 struct resource *res[2]; 177 bus_space_tag_t bst; 178 bus_space_handle_t bsh; 179 device_t dev; 180 struct mtx *lock; 181 void *ih; 182 int pos; 183 int dma_size; 184 bus_dma_tag_t dma_tag; 185 bus_dmamap_t dma_map; 186 bus_addr_t buf_base_phys; 187 uint32_t *buf_base; 188 struct sdma_conf *conf; 189 struct ssi_rate *sr; 190 struct sdma_softc *sdma_sc; 191 int sdma_ev_rx; 192 int sdma_ev_tx; 193 int sdma_channel; 194 }; 195 196 /* Channel registers */ 197 struct sc_chinfo { 198 struct snd_dbuf *buffer; 199 struct pcm_channel *channel; 200 struct sc_pcminfo *parent; 201 202 /* Channel information */ 203 uint32_t dir; 204 uint32_t format; 205 206 /* Flags */ 207 uint32_t run; 208 }; 209 210 /* PCM device private data */ 211 struct sc_pcminfo { 212 device_t dev; 213 uint32_t (*ih)(struct sc_pcminfo *scp); 214 uint32_t chnum; 215 struct sc_chinfo chan[SSI_NCHANNELS]; 216 struct sc_info *sc; 217 }; 218 219 static struct resource_spec ssi_spec[] = { 220 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 221 { SYS_RES_IRQ, 0, RF_ACTIVE }, 222 { -1, 0 } 223 }; 224 225 static int setup_dma(struct sc_pcminfo *scp); 226 static void setup_ssi(struct sc_info *); 227 static void ssi_configure_clock(struct sc_info *); 228 229 /* 230 * Mixer interface. 231 */ 232 233 static int 234 ssimixer_init(struct snd_mixer *m) 235 { 236 struct sc_pcminfo *scp; 237 struct sc_info *sc; 238 int mask; 239 240 scp = mix_getdevinfo(m); 241 sc = scp->sc; 242 243 if (sc == NULL) 244 return -1; 245 246 mask = SOUND_MASK_PCM; 247 mask |= SOUND_MASK_VOLUME; 248 249 snd_mtxlock(sc->lock); 250 pcm_setflags(scp->dev, pcm_getflags(scp->dev) | SD_F_SOFTPCMVOL); 251 mix_setdevs(m, mask); 252 snd_mtxunlock(sc->lock); 253 254 return (0); 255 } 256 257 static int 258 ssimixer_set(struct snd_mixer *m, unsigned dev, 259 unsigned left, unsigned right) 260 { 261 struct sc_pcminfo *scp; 262 263 scp = mix_getdevinfo(m); 264 265 /* Here we can configure hardware volume on our DAC */ 266 267 #if 1 268 device_printf(scp->dev, "ssimixer_set() %d %d\n", 269 left, right); 270 #endif 271 272 return (0); 273 } 274 275 static kobj_method_t ssimixer_methods[] = { 276 KOBJMETHOD(mixer_init, ssimixer_init), 277 KOBJMETHOD(mixer_set, ssimixer_set), 278 KOBJMETHOD_END 279 }; 280 MIXER_DECLARE(ssimixer); 281 282 283 /* 284 * Channel interface. 285 */ 286 287 static void * 288 ssichan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, 289 struct pcm_channel *c, int dir) 290 { 291 struct sc_pcminfo *scp; 292 struct sc_chinfo *ch; 293 struct sc_info *sc; 294 295 scp = (struct sc_pcminfo *)devinfo; 296 sc = scp->sc; 297 298 snd_mtxlock(sc->lock); 299 ch = &scp->chan[0]; 300 ch->dir = dir; 301 ch->run = 0; 302 ch->buffer = b; 303 ch->channel = c; 304 ch->parent = scp; 305 snd_mtxunlock(sc->lock); 306 307 if (sndbuf_setup(ch->buffer, sc->buf_base, sc->dma_size) != 0) { 308 device_printf(scp->dev, "Can't setup sndbuf.\n"); 309 return NULL; 310 } 311 312 return ch; 313 } 314 315 static int 316 ssichan_free(kobj_t obj, void *data) 317 { 318 struct sc_chinfo *ch = data; 319 struct sc_pcminfo *scp = ch->parent; 320 struct sc_info *sc = scp->sc; 321 322 #if 0 323 device_printf(scp->dev, "ssichan_free()\n"); 324 #endif 325 326 snd_mtxlock(sc->lock); 327 /* TODO: free channel buffer */ 328 snd_mtxunlock(sc->lock); 329 330 return (0); 331 } 332 333 static int 334 ssichan_setformat(kobj_t obj, void *data, uint32_t format) 335 { 336 struct sc_chinfo *ch = data; 337 338 ch->format = format; 339 340 return (0); 341 } 342 343 static uint32_t 344 ssichan_setspeed(kobj_t obj, void *data, uint32_t speed) 345 { 346 struct sc_pcminfo *scp; 347 struct sc_chinfo *ch; 348 struct ssi_rate *sr; 349 struct sc_info *sc; 350 int threshold; 351 int i; 352 353 ch = data; 354 scp = ch->parent; 355 sc = scp->sc; 356 357 sr = NULL; 358 359 /* First look for equal frequency. */ 360 for (i = 0; rate_map[i].speed != 0; i++) { 361 if (rate_map[i].speed == speed) 362 sr = &rate_map[i]; 363 } 364 365 /* If no match, just find nearest. */ 366 if (sr == NULL) { 367 for (i = 0; rate_map[i].speed != 0; i++) { 368 sr = &rate_map[i]; 369 threshold = sr->speed + ((rate_map[i + 1].speed != 0) ? 370 ((rate_map[i + 1].speed - sr->speed) >> 1) : 0); 371 if (speed < threshold) 372 break; 373 } 374 } 375 376 sc->sr = sr; 377 378 ssi_configure_clock(sc); 379 380 return (sr->speed); 381 } 382 383 static void 384 ssi_configure_clock(struct sc_info *sc) 385 { 386 struct ssi_rate *sr; 387 388 sr = sc->sr; 389 390 pll4_configure_output(sr->mfi, sr->mfn, sr->mfd); 391 392 /* Configure other dividers here, if any */ 393 } 394 395 static uint32_t 396 ssichan_setblocksize(kobj_t obj, void *data, uint32_t blocksize) 397 { 398 struct sc_chinfo *ch = data; 399 struct sc_pcminfo *scp = ch->parent; 400 struct sc_info *sc = scp->sc; 401 402 sndbuf_resize(ch->buffer, sc->dma_size / blocksize, blocksize); 403 404 setup_dma(scp); 405 406 return (sndbuf_getblksz(ch->buffer)); 407 } 408 409 uint32_t 410 ssi_dma_intr(void *arg, int chn) 411 { 412 struct sc_pcminfo *scp; 413 struct sdma_conf *conf; 414 struct sc_chinfo *ch; 415 struct sc_info *sc; 416 int bufsize; 417 418 scp = arg; 419 ch = &scp->chan[0]; 420 sc = scp->sc; 421 conf = sc->conf; 422 423 bufsize = sndbuf_getsize(ch->buffer); 424 425 sc->pos += conf->period; 426 if (sc->pos >= bufsize) 427 sc->pos -= bufsize; 428 429 if (ch->run) 430 chn_intr(ch->channel); 431 432 return (0); 433 } 434 435 static int 436 find_sdma_controller(struct sc_info *sc) 437 { 438 struct sdma_softc *sdma_sc; 439 phandle_t node, sdma_node; 440 device_t sdma_dev; 441 int dts_value[8]; 442 int len; 443 444 if ((node = ofw_bus_get_node(sc->dev)) == -1) 445 return (ENXIO); 446 447 if ((len = OF_getproplen(node, "dmas")) <= 0) 448 return (ENXIO); 449 450 OF_getprop(node, "dmas", &dts_value, len); 451 452 sc->sdma_ev_rx = fdt32_to_cpu(dts_value[1]); 453 sc->sdma_ev_tx = fdt32_to_cpu(dts_value[5]); 454 455 sdma_node = OF_node_from_xref(fdt32_to_cpu(dts_value[0])); 456 457 sdma_sc = NULL; 458 459 sdma_dev = devclass_get_device(devclass_find("sdma"), 0); 460 if (sdma_dev) 461 sdma_sc = device_get_softc(sdma_dev); 462 463 if (sdma_sc == NULL) { 464 device_printf(sc->dev, "No sDMA found. Can't operate\n"); 465 return (ENXIO); 466 }; 467 468 sc->sdma_sc = sdma_sc; 469 470 return (0); 471 }; 472 473 static int 474 setup_dma(struct sc_pcminfo *scp) 475 { 476 struct sdma_conf *conf; 477 struct sc_chinfo *ch; 478 struct sc_info *sc; 479 int fmt; 480 481 ch = &scp->chan[0]; 482 sc = scp->sc; 483 conf = sc->conf; 484 485 conf->ih = ssi_dma_intr; 486 conf->ih_user = scp; 487 conf->saddr = sc->buf_base_phys; 488 conf->daddr = rman_get_start(sc->res[0]) + SSI_STX0; 489 conf->event = sc->sdma_ev_tx; /* SDMA TX event */ 490 conf->period = sndbuf_getblksz(ch->buffer); 491 conf->num_bd = sndbuf_getblkcnt(ch->buffer); 492 493 /* 494 * Word Length 495 * Can be 32, 24, 16 or 8 for sDMA. 496 * 497 * SSI supports 24 at max. 498 */ 499 500 fmt = sndbuf_getfmt(ch->buffer); 501 502 if (fmt & AFMT_16BIT) { 503 conf->word_length = 16; 504 conf->command = CMD_2BYTES; 505 } else if (fmt & AFMT_24BIT) { 506 conf->word_length = 24; 507 conf->command = CMD_3BYTES; 508 } else { 509 device_printf(sc->dev, "Unknown format\n"); 510 return (-1); 511 } 512 513 return (0); 514 } 515 516 static int 517 ssi_start(struct sc_pcminfo *scp) 518 { 519 struct sc_info *sc; 520 int reg; 521 522 sc = scp->sc; 523 524 if (sdma_configure(sc->sdma_channel, sc->conf) != 0) { 525 device_printf(sc->dev, "Can't configure sDMA\n"); 526 return (-1); 527 } 528 529 /* Enable DMA interrupt */ 530 reg = (SIER_TDMAE); 531 WRITE4(sc, SSI_SIER, reg); 532 533 sdma_start(sc->sdma_channel); 534 535 return (0); 536 } 537 538 static int 539 ssi_stop(struct sc_pcminfo *scp) 540 { 541 struct sc_info *sc; 542 int reg; 543 544 sc = scp->sc; 545 546 reg = READ4(sc, SSI_SIER); 547 reg &= ~(SIER_TDMAE); 548 WRITE4(sc, SSI_SIER, reg); 549 550 sdma_stop(sc->sdma_channel); 551 552 bzero(sc->buf_base, sc->dma_size); 553 554 return (0); 555 } 556 557 static int 558 ssichan_trigger(kobj_t obj, void *data, int go) 559 { 560 struct sc_pcminfo *scp; 561 struct sc_chinfo *ch; 562 struct sc_info *sc; 563 564 ch = data; 565 scp = ch->parent; 566 sc = scp->sc; 567 568 snd_mtxlock(sc->lock); 569 570 switch (go) { 571 case PCMTRIG_START: 572 #if 0 573 device_printf(scp->dev, "trigger start\n"); 574 #endif 575 ch->run = 1; 576 577 ssi_start(scp); 578 579 break; 580 581 case PCMTRIG_STOP: 582 case PCMTRIG_ABORT: 583 #if 0 584 device_printf(scp->dev, "trigger stop or abort\n"); 585 #endif 586 ch->run = 0; 587 588 ssi_stop(scp); 589 590 break; 591 } 592 593 snd_mtxunlock(sc->lock); 594 595 return (0); 596 } 597 598 static uint32_t 599 ssichan_getptr(kobj_t obj, void *data) 600 { 601 struct sc_pcminfo *scp; 602 struct sc_chinfo *ch; 603 struct sc_info *sc; 604 605 ch = data; 606 scp = ch->parent; 607 sc = scp->sc; 608 609 return (sc->pos); 610 } 611 612 static uint32_t ssi_pfmt[] = { 613 SND_FORMAT(AFMT_S24_LE, 2, 0), 614 0 615 }; 616 617 static struct pcmchan_caps ssi_pcaps = {44100, 192000, ssi_pfmt, 0}; 618 619 static struct pcmchan_caps * 620 ssichan_getcaps(kobj_t obj, void *data) 621 { 622 623 return (&ssi_pcaps); 624 } 625 626 static kobj_method_t ssichan_methods[] = { 627 KOBJMETHOD(channel_init, ssichan_init), 628 KOBJMETHOD(channel_free, ssichan_free), 629 KOBJMETHOD(channel_setformat, ssichan_setformat), 630 KOBJMETHOD(channel_setspeed, ssichan_setspeed), 631 KOBJMETHOD(channel_setblocksize, ssichan_setblocksize), 632 KOBJMETHOD(channel_trigger, ssichan_trigger), 633 KOBJMETHOD(channel_getptr, ssichan_getptr), 634 KOBJMETHOD(channel_getcaps, ssichan_getcaps), 635 KOBJMETHOD_END 636 }; 637 CHANNEL_DECLARE(ssichan); 638 639 static int 640 ssi_probe(device_t dev) 641 { 642 643 if (!ofw_bus_status_okay(dev)) 644 return (ENXIO); 645 646 if (!ofw_bus_is_compatible(dev, "fsl,imx6q-ssi")) 647 return (ENXIO); 648 649 device_set_desc(dev, "i.MX6 Synchronous Serial Interface (SSI)"); 650 return (BUS_PROBE_DEFAULT); 651 } 652 653 static void 654 ssi_intr(void *arg) 655 { 656 struct sc_pcminfo *scp; 657 struct sc_chinfo *ch; 658 struct sc_info *sc; 659 660 scp = arg; 661 sc = scp->sc; 662 ch = &scp->chan[0]; 663 664 /* We don't use SSI interrupt */ 665 #if 0 666 device_printf(sc->dev, "SSI Intr 0x%08x\n", 667 READ4(sc, SSI_SISR)); 668 #endif 669 } 670 671 static void 672 setup_ssi(struct sc_info *sc) 673 { 674 int reg; 675 676 reg = READ4(sc, SSI_STCCR); 677 reg &= ~(WL3_WL0_M << WL3_WL0_S); 678 reg |= (0xb << WL3_WL0_S); /* 24 bit */ 679 reg &= ~(DC4_DC0_M << DC4_DC0_S); 680 reg |= (1 << DC4_DC0_S); /* 2 words per frame */ 681 reg &= ~(STCCR_DIV2); /* Divide by 1 */ 682 reg &= ~(STCCR_PSR); /* Divide by 1 */ 683 reg &= ~(PM7_PM0_M << PM7_PM0_S); 684 reg |= (1 << PM7_PM0_S); /* Divide by 2 */ 685 WRITE4(sc, SSI_STCCR, reg); 686 687 reg = READ4(sc, SSI_SFCSR); 688 reg &= ~(SFCSR_TFWM0_M << SFCSR_TFWM0_S); 689 reg |= (8 << SFCSR_TFWM0_S); /* empty slots */ 690 WRITE4(sc, SSI_SFCSR, reg); 691 692 reg = READ4(sc, SSI_STCR); 693 reg |= (STCR_TFEN0); 694 reg &= ~(STCR_TFEN1); 695 reg &= ~(STCR_TSHFD); /* MSB */ 696 reg |= (STCR_TXBIT0); 697 reg |= (STCR_TXDIR | STCR_TFDIR); 698 reg |= (STCR_TSCKP); /* falling edge */ 699 reg |= (STCR_TFSI); 700 reg &= ~(STCR_TFSI); /* active high frame sync */ 701 reg &= ~(STCR_TFSL); 702 reg |= STCR_TEFS; 703 WRITE4(sc, SSI_STCR, reg); 704 705 reg = READ4(sc, SSI_SCR); 706 reg &= ~(SCR_I2S_MODE_M << SCR_I2S_MODE_S); /* Not master */ 707 reg |= (SCR_SSIEN | SCR_TE); 708 reg |= (SCR_NET); 709 reg |= (SCR_SYN); 710 WRITE4(sc, SSI_SCR, reg); 711 } 712 713 static void 714 ssi_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 715 { 716 bus_addr_t *addr; 717 718 if (err) 719 return; 720 721 addr = (bus_addr_t*)arg; 722 *addr = segs[0].ds_addr; 723 } 724 725 static int 726 ssi_attach(device_t dev) 727 { 728 char status[SND_STATUSLEN]; 729 struct sc_pcminfo *scp; 730 struct sc_info *sc; 731 int err; 732 733 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO); 734 sc->dev = dev; 735 sc->sr = &rate_map[0]; 736 sc->pos = 0; 737 sc->conf = malloc(sizeof(struct sdma_conf), M_DEVBUF, M_WAITOK | M_ZERO); 738 739 sc->lock = snd_mtxcreate(device_get_nameunit(dev), "ssi softc"); 740 if (sc->lock == NULL) { 741 device_printf(dev, "Cant create mtx\n"); 742 return (ENXIO); 743 } 744 745 if (bus_alloc_resources(dev, ssi_spec, sc->res)) { 746 device_printf(dev, "could not allocate resources\n"); 747 return (ENXIO); 748 } 749 750 /* Memory interface */ 751 sc->bst = rman_get_bustag(sc->res[0]); 752 sc->bsh = rman_get_bushandle(sc->res[0]); 753 754 /* SDMA */ 755 if (find_sdma_controller(sc)) { 756 device_printf(dev, "could not find active SDMA\n"); 757 return (ENXIO); 758 } 759 760 /* Setup PCM */ 761 scp = malloc(sizeof(struct sc_pcminfo), M_DEVBUF, M_NOWAIT | M_ZERO); 762 scp->sc = sc; 763 scp->dev = dev; 764 765 /* 766 * Maximum possible DMA buffer. 767 * Will be used partialy to match 24 bit word. 768 */ 769 sc->dma_size = 131072; 770 771 /* 772 * Must use dma_size boundary as modulo feature required. 773 * Modulo feature allows setup circular buffer. 774 */ 775 776 err = bus_dma_tag_create( 777 bus_get_dma_tag(sc->dev), 778 4, sc->dma_size, /* alignment, boundary */ 779 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 780 BUS_SPACE_MAXADDR, /* highaddr */ 781 NULL, NULL, /* filter, filterarg */ 782 sc->dma_size, 1, /* maxsize, nsegments */ 783 sc->dma_size, 0, /* maxsegsize, flags */ 784 NULL, NULL, /* lockfunc, lockarg */ 785 &sc->dma_tag); 786 787 err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->buf_base, 788 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &sc->dma_map); 789 if (err) { 790 device_printf(dev, "cannot allocate framebuffer\n"); 791 return (ENXIO); 792 } 793 794 err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->buf_base, 795 sc->dma_size, ssi_dmamap_cb, &sc->buf_base_phys, BUS_DMA_NOWAIT); 796 if (err) { 797 device_printf(dev, "cannot load DMA map\n"); 798 return (ENXIO); 799 } 800 801 bzero(sc->buf_base, sc->dma_size); 802 803 /* Setup interrupt handler */ 804 err = bus_setup_intr(dev, sc->res[1], INTR_MPSAFE | INTR_TYPE_AV, 805 NULL, ssi_intr, scp, &sc->ih); 806 if (err) { 807 device_printf(dev, "Unable to alloc interrupt resource.\n"); 808 return (ENXIO); 809 } 810 811 pcm_setflags(dev, pcm_getflags(dev) | SD_F_MPSAFE); 812 813 err = pcm_register(dev, scp, 1, 0); 814 if (err) { 815 device_printf(dev, "Can't register pcm.\n"); 816 return (ENXIO); 817 } 818 819 scp->chnum = 0; 820 pcm_addchan(dev, PCMDIR_PLAY, &ssichan_class, scp); 821 scp->chnum++; 822 823 snprintf(status, SND_STATUSLEN, "at simplebus"); 824 pcm_setstatus(dev, status); 825 826 mixer_init(dev, &ssimixer_class, scp); 827 setup_ssi(sc); 828 829 imx_ccm_ssi_configure(dev); 830 831 sc->sdma_channel = sdma_alloc(); 832 if (sc->sdma_channel < 0) { 833 device_printf(sc->dev, "Can't get sDMA channel\n"); 834 return (1); 835 } 836 837 return (0); 838 } 839 840 static device_method_t ssi_pcm_methods[] = { 841 DEVMETHOD(device_probe, ssi_probe), 842 DEVMETHOD(device_attach, ssi_attach), 843 { 0, 0 } 844 }; 845 846 static driver_t ssi_pcm_driver = { 847 "pcm", 848 ssi_pcm_methods, 849 PCM_SOFTC_SIZE, 850 }; 851 852 DRIVER_MODULE(ssi, simplebus, ssi_pcm_driver, pcm_devclass, 0, 0); 853 MODULE_DEPEND(ssi, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); 854 MODULE_VERSION(ssi, 1); 855